state the purpose of fly levelling
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IntroductionFly levelling is a very approximate form of levelling in which sights are taken as largeas possible. In this method a line of levels is run to determine approximately reduced levelsof the points carried out with more rapidly and less precision. It is a levelling that is done toconnect benchmark to the starting point of the survey line.
In this levelling only back sightand fore sight readings are taken and auto level is moved strictly on the line joining benchmark and starting point of survey line.If the work site is away
rom the benchmark* surveyor starts the work with a back sight on the benchmark by setting instrument at a convenient point. Then he proceeds towardsthe site by taking fore sights and back sights on a number of change points till he establishesa temporary benchmark in the site. +est of the levelling work is carried out in the site. t theend of the work again levelling is carried out by taking a set of convenient change points tillthe bench work is reached. This type of levelling in which only back sight and fore sights aretaken* is called fly levelling* the purpose being to connect a benchmark with a temporary benchmark or vice versa. Thus the difference between fly levelling and differential levellingis only in the purpose of levelling-Fly levelling performed when work site is very far away from the bench mark.
Thesurveyor starts by taking back sight at bench mark and proceed towards worksite till the findsa suitable place for temporary /works are done with respect to temporary /it theend of the day the surveyors comes back to original bench mark.
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I Hope it's help you!!
please tick the brainliest answer
_______________________________
_______________________________
Your Answer.
IntroductionFly levelling is a very approximate form of levelling in which sights are taken as largeas possible. In this method a line of levels is run to determine approximately reduced levelsof the points carried out with more rapidly and less precision. It is a levelling that is done toconnect benchmark to the starting point of the survey line.
In this levelling only back sightand fore sight readings are taken and auto level is moved strictly on the line joining benchmark and starting point of survey line.If the work site is away
rom the benchmark* surveyor starts the work with a back sight on the benchmark by setting instrument at a convenient point. Then he proceeds towardsthe site by taking fore sights and back sights on a number of change points till he establishesa temporary benchmark in the site. +est of the levelling work is carried out in the site. t theend of the work again levelling is carried out by taking a set of convenient change points tillthe bench work is reached. This type of levelling in which only back sight and fore sights aretaken* is called fly levelling* the purpose being to connect a benchmark with a temporary benchmark or vice versa. Thus the difference between fly levelling and differential levellingis only in the purpose of levelling-Fly levelling performed when work site is very far away from the bench mark.
Thesurveyor starts by taking back sight at bench mark and proceed towards worksite till the findsa suitable place for temporary /works are done with respect to temporary /it theend of the day the surveyors comes back to original bench mark.
_______________________________
_______________________________
I Hope it's help you!!
please tick the brainliest answer
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